Your username will always be the full email address you used when you registered for your Cineverse account.
If you registered for an account through the Android app, your username would be the email that is associated with your Google Play account.
If you registered for an account through iTunes, your username would be the email that is associated with your iTunes account, unless you did not use your Apple ID to subscribe.
If you registered through your Roku, your username might be the same email that is associated with your Roku account.
If you need assistance recovering your username, you can always contact us.